- Calhan
- Campion
- Campo
- Cañon City
- Capulin
- Carbondale
- Carriage Club
- Cascade-Chipita Park
- Castle Pines
- Castle Pines North
- Castle Rock
- Castlewood
- Cathedral
- Catherine
- Cattle Creek
- Cedaredge
- Center
- Central City
- Chacra
- Cheraw
- Cherry Creek
- Cherry Hills Village
- Cheyenne Wells
- Cimarron Hills
- Coal Creek
- Coal Creek
- Coaldale
- Cokedale
- Collbran
- Colona
- Colorado City
- Columbine Valley
- Comanche Creek
- Commerce City
- Conejos
- Cooper
- Copper Mountain
- Copper Mountain
- Cortez
- Cotopaxi
- Cottonwood
- Craig
- Crawford
- Creede
- Crested Butte
- Crested Butte Mountain Resort
- Crestone
- Cripple Creek
- Crisman
- Crook
- Crowley
